{"slug":"what-limit-price-should-i-set","qid":"spread_clock","label":"AAPL quoted spread by time of day, premarket through late session","post_title":"What Limit Price Should I Set on a Stock?","post_url":"/blog/what-limit-price-should-i-set#q-spread_clock","columns":["et_time","spread_cents","spread_bps"],"rows":[{"et_time":"04:00","spread_cents":25.4,"spread_bps":7.7},{"et_time":"04:30","spread_cents":21.52,"spread_bps":6.5},{"et_time":"05:00","spread_cents":19.66,"spread_bps":5.9},{"et_time":"05:30","spread_cents":19.59,"spread_bps":5.9},{"et_time":"06:00","spread_cents":23.58,"spread_bps":7.1},{"et_time":"06:30","spread_cents":24.18,"spread_bps":7.3},{"et_time":"07:00","spread_cents":19.39,"spread_bps":5.9},{"et_time":"07:30","spread_cents":15.08,"spread_bps":4.6},{"et_time":"08:00","spread_cents":15.98,"spread_bps":4.8},{"et_time":"08:30","spread_cents":19.35,"spread_bps":5.8},{"et_time":"09:00","spread_cents":27.06,"spread_bps":8.2},{"et_time":"09:30","spread_cents":6.16,"spread_bps":1.9},{"et_time":"10:00","spread_cents":4.01,"spread_bps":1.2},{"et_time":"10:30","spread_cents":4.03,"spread_bps":1.2},{"et_time":"11:00","spread_cents":3.27,"spread_bps":1},{"et_time":"11:30","spread_cents":3.19,"spread_bps":1},{"et_time":"12:00","spread_cents":2.74,"spread_bps":0.8},{"et_time":"12:30","spread_cents":2.62,"spread_bps":0.8},{"et_time":"13:00","spread_cents":2.3,"spread_bps":0.7},{"et_time":"13:30","spread_cents":2.28,"spread_bps":0.7},{"et_time":"14:00","spread_cents":2.05,"spread_bps":0.6},{"et_time":"14:30","spread_cents":2.01,"spread_bps":0.6},{"et_time":"15:00","spread_cents":2.17,"spread_bps":0.7},{"et_time":"15:30","spread_cents":2.14,"spread_bps":0.6},{"et_time":"16:00","spread_cents":16.15,"spread_bps":4.9},{"et_time":"16:30","spread_cents":9.92,"spread_bps":3}],"shape":"series","sql":"SELECT\n    formatDateTime(toStartOfInterval(toTimeZone(sip_timestamp, 'America/New_York'), INTERVAL 30 MINUTE), '%H:%i') AS et_time,\n    round(avg(toFloat64(ask_price) - toFloat64(bid_price)) * 100, 2) AS spread_cents,\n    round(avg((toFloat64(ask_price) - toFloat64(bid_price))\n              / ((toFloat64(ask_price) + toFloat64(bid_price)) / 2)) * 10000, 1) AS spread_bps\nFROM global_markets.cache_stocks_quotes\nWHERE ticker = 'AAPL'\n  AND sip_timestamp >= '2026-09-15 08:00:00'\n  AND sip_timestamp <  '2026-09-15 21:00:00'\n  AND bid_price > 0\n  AND ask_price > bid_price\nGROUP BY et_time\nORDER BY et_time","computed_at":"2026-10-09T15:24:50.969830+00:00","elapsed":0.002816757}